CN110548994B - Laser tailor-welding equipment and method - Google Patents
Laser tailor-welding equipment and method Download PDFInfo
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- CN110548994B CN110548994B CN201910757802.XA CN201910757802A CN110548994B CN 110548994 B CN110548994 B CN 110548994B CN 201910757802 A CN201910757802 A CN 201910757802A CN 110548994 B CN110548994 B CN 110548994B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The invention provides laser tailor-welding equipment, wherein an output shaft of a welding rotating mechanism is connected to a laser welding mechanism and used for driving the laser welding mechanism to rotate; the rotary tray is provided with at least two placing areas, and the placing areas are used for placing a plurality of pieces to be welded; the pre-positioning feeding mechanism is used for taking out the frame structures and placing the frame structures on the positioning clamp platform, and feeding one frame structure at a time; the positioning fixture platform is used for conveying the frame structure placed by the pre-positioning feeding mechanism to the position below the laser welding mechanism.
Description
Technical Field
The invention belongs to the technical field of laser, and particularly relates to laser tailor-welding equipment and a laser tailor-welding method.
Background
The sunroof of the automobile can effectively circulate air inside the automobile and allow outside air to enter the inside of the automobile, can be used for a wide field of vision, and is often used for moving shooting on the automobile. Generally speaking, compared with a non-skylight version, the skylight version of the same automobile has lower performances on the torsional rigidity, NVH, top pressure, snow pressure, outer plate dent resistance and the like of the whole automobile. Therefore, the reinforcing frame structure, thickness and material design of the skylight are especially necessary.
Before the laser tailor-welding technology comes out, the skylight of the automobile is formed by stamping a whole plate, so that the material waste is great, and the cost is high. On the other hand, the required performance of each part on the skylight is different, so the required thickness is different, and the whole-plate stamping mode has redundancy of thickness and performance, and cannot exert the function of the material to the maximum extent. The laser tailor-welding technology is used for automatically welding plates of different materials and different thicknesses through laser energy, reasonably distributing the materials according to different requirements of different parts on performance, realizing the light weight of a vehicle body by using the optimal size and the optimal material distribution, and simultaneously ensuring that the performance of the vehicle body is not reduced. At present, most manufacturers adopt manual feeding and discharging, one skylight piece is subjected to laser welding for multiple times, only one straight-line welding line can be welded each time, and therefore production efficiency is extremely low.
Disclosure of Invention
One of the purposes of the invention is to provide laser tailor-welding equipment to solve the technical problem that most manufacturers in the prior art adopt manual feeding and discharging to laser weld a skylight part for multiple times, and only a straight-line weld joint can be welded each time, so that the production efficiency is extremely low.
In order to realize one of the purposes, the invention adopts the technical scheme that: the laser tailor-welding equipment comprises a feeding device, a processing device and a positioning clamp platform, wherein the feeding device comprises a rotary material disc and a pre-positioning feeding mechanism, and the processing device comprises a welding seam tracker, a laser welding mechanism, a welding rotating mechanism and a welding horizontal driving mechanism; an output shaft of the welding rotating mechanism is connected to the laser welding mechanism and used for driving the laser welding mechanism to rotate, an output shaft of the welding horizontal driving mechanism is connected to the welding rotating mechanism and used for driving the welding rotating mechanism to move in the horizontal direction, and the weld joint tracker is electrically connected to the welding rotating mechanism and the welding horizontal driving mechanism and arranged on the laser welding mechanism;
the rotary tray is provided with at least two placing areas, the placing areas are used for placing a plurality of pieces to be welded, the pieces to be welded are surrounded into a plurality of frame structures, and the frame structures are stacked one by one;
the pre-positioning feeding mechanism is used for taking out the frame structures and placing the frame structures on the positioning clamp platform, and feeding one frame structure at a time;
the positioning clamp platform is used for conveying the frame structure placed by the pre-positioning feeding mechanism to the position below the laser welding mechanism;
the welding seam tracker is used for identifying the welding seam of the frame structure on the positioning clamp platform and controlling the welding rotating mechanism and the welding horizontal driving mechanism according to the direction of the welding seam;
the laser welding mechanism is used for welding the frame structure on the positioning fixture platform into a finished frame.
The laser tailor-welding equipment provided by the invention has the beneficial effects that: compared with the prior art, the welding method has the advantages that the operators place the to-be-welded parts on the placing area of the rotary tray, and the to-be-welded parts on the placing area enclose a window frame, namely the to-be-welded parts enclose a square frame. When the pre-positioning feeding mechanism clamps a to-be-welded part on a placing area, an operator places the to-be-welded part on other placing areas, and the sufficiency of materials of the laser tailor-welding equipment is ensured, so that the uninterrupted feeding of the pre-positioning feeding mechanism is realized. The positioning clamp platform is convenient for horizontally placing the parts to be welded, so that the machining device can accurately weld the parts to be welded. The laser welding mechanism moves in the horizontal direction, and a welding seam tracker is installed on the laser welding mechanism and can identify and track welding seams, so that the production efficiency and the yield of equipment are improved. Because the equipment is mainly used for welding the parts to be welded, the welding seams between some parts to be welded are two transverse and two vertical welding seams, and the tracking direction of the welding seam tracker must be right ahead of the welding direction, when the laser welding mechanism welds the two transverse and two vertical welding seams, the welding head of the laser welding mechanism needs to rotate 90 degrees, so that the welding seam can be conveniently identified by the welding seam tracker. The processing device reduces the number of the laser welding mechanisms, so that the parts to be welded are welded at one time, and the production efficiency of the laser tailor-welding equipment is improved.
Furthermore, the device also comprises a pre-positioning clamp platform and a feeding mechanism;
the pre-positioning feeding mechanism is used for taking out the frame structure and placing the frame structure on the pre-positioning fixture platform; the pre-positioning clamp platform is used for keeping a preset distance between the to-be-welded pieces of the frame structure;
and the feeding mechanism is used for taking out the frame structure on the pre-positioning fixture platform and placing the frame structure on the positioning fixture platform.
Further, the pre-positioning fixture platform comprises a placing table and a plurality of positioning blocks arranged on the placing table, and a placing area for placing the frame structure is formed between the positioning blocks.
Furthermore, a double-material detection device is arranged on the pre-positioning feeding mechanism and electrically connected to the pre-positioning feeding mechanism, the double-material detection device is used for detecting whether one frame structure is connected with the to-be-welded part of the adjacent frame structure in the placing area, and if the frame structure is not connected with the to-be-welded part of the adjacent frame structure in the placing area, the double-material detection device controls the pre-positioning feeding mechanism to place the to-be-welded part on the pre-positioning fixture platform; and if the to-be-welded part of the adjacent frame structure in the placing area is connected with one frame structure is detected, the double-material detection device does not control the pre-positioning feeding mechanism to place the to-be-welded part on the pre-positioning fixture platform.
Furthermore, a suction device is arranged on the positioning clamp platform and used for adsorbing the frame structure and directly contacting the frame structure on the horizontal surface of the clamp platform.
Further, the suction device is an electromagnet or a vacuum adsorption device.
The positioning platform is movable to the position above the positioning clamp platform or far away from the positioning clamp platform, an anti-misalignment mechanism and a driving device are arranged on the positioning platform, the driving device is used for driving the anti-misalignment mechanism to ascend or descend, and the anti-misalignment mechanism is used for abutting against the frame structure on the positioning platform.
Furthermore, be equipped with a plurality of setting elements and side pushing mechanism on the positioning fixture platform, the wrong limit mechanism of preventing encloses and locates the setting element, side pushing mechanism is used for the drive on the positioning fixture platform the frame structure wait that the weldment level activity extremely the setting element.
Further, still include unloading mechanism, unloading mechanism sets up the top of positioning fixture platform, the positioning fixture platform is used for welding wait that the weldment carries extremely the below of unloading mechanism, finished product frame is got and finished product station is placed to unloading mechanism clamp.
The second purpose of the invention is to provide a laser tailor-welding method, in order to realize the second purpose, the technical scheme adopted by the invention is as follows: the laser tailor-welding device comprises the following steps:
s1: placing the to-be-welded parts in a placing area of the rotary tray;
s2: rotating the rotary tray to enable a placing area where a part to be welded is placed to be located at the pre-positioning feeding mechanism;
s3: and finishing the welding of the frame structure on the positioning fixture platform through the machining device, and taking down the finished frame on the positioning fixture platform.
The laser tailor-welding method provided by the invention has the beneficial effects that: compared with the prior art, the method is simple to operate, the feeding convenience of the laser tailor-welding equipment is improved, and the welding efficiency of the laser tailor-welding equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a laser tailor-welding apparatus according to an embodiment of the present invention;
fig. 2 is a schematic partial structural diagram of a laser tailor-welding device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a processing device of a laser tailor-welding apparatus according to an embodiment of the present invention;
fig. 4 is a schematic partial structural diagram of a laser tailor-welding device according to an embodiment of the present invention;
fig. 5 is a schematic partial structural diagram of a laser tailor-welding device according to an embodiment of the present invention;
fig. 6 is a schematic partial structural diagram of a laser tailor-welding device according to an embodiment of the present invention;
FIG. 7 is an enlarged view taken at A in FIG. 6;
FIG. 8 is a first schematic flow chart of a laser tailor-welding method according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of a laser tailor-welding method according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a feeding device; 11. rotating the material tray; 111. a placement area; 12. pre-positioning a feeding mechanism; 121. pre-positioning a feeding truss; 122. pre-positioning a feeding gripper; 2. a processing device; 21. a weld tracker; 22. a laser welding mechanism; 23. welding the rotating mechanism; 24. welding a horizontal driving mechanism; 3. positioning a fixture platform; 31. positioning a fixture table; 32. a bed body; 33. a positioning member; 34. a side pushing mechanism; 4. pre-positioning the fixture platform; 41. a placing table; 42. positioning blocks; 43. a synchronous belt driving device; 44. mounting a plate; 5. a feeding mechanism; 51. a truss arrangement; 52. a feeding gripper; 6. a suction device; 7. positioning the platform; 71. a wrong edge prevention mechanism; 711. a mounting seat; 712. a roller; 72. a drive device; 73. a positioning table; 74. a horizontal drive assembly; 8. a blanking mechanism.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 and fig. 3, a laser tailor-welding apparatus according to the present invention will now be described. A laser welding device comprises a feeding device 1, a processing device 2 and a positioning fixture platform 3, wherein the feeding device 1 comprises a rotary tray 11 and a pre-positioning feeding mechanism 12, and the processing device 2 comprises a welding seam tracker 21, a laser welding mechanism 22, a welding rotating mechanism 23 and a welding horizontal driving mechanism 24; an output shaft of the welding rotating mechanism 23 is connected to the laser welding mechanism 22 and used for driving the laser welding mechanism 22 to rotate, an output shaft of the welding horizontal driving mechanism 24 is connected to the welding rotating mechanism 23 and used for driving the welding rotating mechanism 23 to move in the horizontal direction, and the weld joint tracker 21 is electrically connected to the welding rotating mechanism 23 and the welding horizontal driving mechanism 24 and is arranged on the laser welding mechanism 22;
the rotary tray 11 is provided with at least two placing areas 111, the placing areas 111 are used for placing a plurality of pieces to be welded, wherein the pieces to be welded are surrounded into a plurality of frame structures, and the frame structures are stacked one by one;
the pre-positioning feeding mechanism 12 is used for taking out the frame structures and placing the frame structures on the positioning clamp platform 3, and feeding one frame structure at a time;
the positioning fixture platform 3 is used for conveying the frame structure placed by the pre-positioning feeding mechanism 12 to the lower part of the laser welding mechanism 22;
the welding seam tracker 21 is used for identifying the welding seam of the frame structure on the positioning fixture platform 3 and controlling the welding rotating mechanism 23 and the welding horizontal driving mechanism 24 according to the direction of the welding seam;
the laser welding mechanism 22 is used to weld the frame structure on the positioning jig platform 3 into a finished frame.
Compared with the prior art, the laser tailor-welding equipment provided by the invention has the advantages that an operator places the parts to be welded on the placing area 111 of the rotary tray 11, and the parts to be welded on the placing area 111 form a window frame in a surrounding mode, namely the parts to be welded form a square frame in a surrounding mode. When the pre-positioning feeding mechanism 12 clamps a to-be-welded part on the placing area 111, an operator places the to-be-welded part on the other placing area 111, so that the sufficiency of the materials of the laser tailor-welding equipment is ensured, and the uninterrupted feeding of the pre-positioning feeding mechanism 12 is realized. The positioning clamp platform 3 is convenient for horizontally placing the parts to be welded, so that the machining device 2 can accurately weld the parts to be welded. The laser welding mechanism 22 moves in the horizontal direction, the welding seam tracker 21 is installed on the laser welding mechanism 22, the welding seam can be identified and tracked by the welding seam tracker 21, and the production efficiency and the yield of the equipment are improved. Because the equipment is mainly used for welding the parts to be welded, the welding seams between some parts to be welded are two transverse and two vertical welding seams, and the tracking direction of the welding seam tracker 21 is necessarily in the front of the welding direction, when the laser welding mechanism 22 welds the two transverse and two vertical welding seams, the welding head of the laser welding mechanism 22 needs to rotate 90 degrees, so that the welding seam can be conveniently identified by the welding seam tracker 21. The processing device 2 reduces the number of the laser welding mechanisms 22, so that the parts to be welded are welded at one time, and the production efficiency of the laser tailor-welding equipment is improved.
Specifically, two placing areas 111 are provided, one placing area 111 is used for feeding materials manually when automatic feeding is performed, and the other placing area 111 is used for feeding materials manually. The rotary tray 11 is of a turntable structure, so that the floor area of the equipment can be effectively saved.
Optimally, the rotary tray 11 adopts a quick-change mounting structure, namely, the rotary tray 11 can be replaced according to parts to be welded with different specifications.
Further, referring to fig. 1 and fig. 3 together, as a specific embodiment of the laser tailor-welding apparatus provided by the present invention, the apparatus further includes a pre-positioning fixture platform 4 and a feeding mechanism 5;
the pre-positioning feeding mechanism 12 is used for taking out the frame structure and placing the frame structure on the pre-positioning fixture platform 4;
the pre-positioning fixture platform 4 is used for keeping a preset distance for a gap between pieces to be welded of the frame structure;
the feed mechanism 5 is used to take out and place the frame structure on the pre-positioning jig platform 4 on the positioning jig platform 3.
Specifically, referring to fig. 1 and 4, the pre-positioning feeding mechanism 12 includes a pre-positioning feeding truss 121 and a pre-positioning feeding gripper 122, and the pre-positioning feeding truss 121 spans over the rotating tray 11. The pre-positioning feeding gripper 122 is slidably connected to the pre-positioning feeding truss 121. The pre-positioning feeding hand 122 is provided as a vacuum chuck.
Specifically, referring to fig. 1, 5 and 6, the positioning jig platform 3 includes a positioning jig table 31 and a bed 32, the positioning jig table 31 is connected to the bed 32, the positioning jig table 31 slides along the vehicle body, and the vehicle body drives the positioning jig table 31 to move. The feeding mechanism 5 comprises a truss device 51 and a feeding gripper 52, the truss device 51 spans the vehicle body and the pre-positioning fixture platform 4, and the feeding gripper 52 is connected to the truss device 51 in a sliding mode. The feeding gripper 52 is provided as a vacuum cup.
Preferably, the placing surface of the pre-positioning fixture platform 4 is movable above the rotary tray 11 and below the pre-positioning feeding gripper 122.
Further, referring to fig. 2, as a specific embodiment of the laser tailor-welding apparatus provided by the present invention, the pre-positioning fixture platform 4 includes a placing table 41 and a plurality of positioning blocks 42 disposed on the placing table 41, and a placing area for placing a frame structure is formed between the positioning blocks 42.
The positioning block 42 is adopted to mechanically position the parts to be welded, so that the gap between the parts to be welded is fixed, and the subsequent accurate positioning of the parts to be welded is facilitated. The positioning block 42 has a simple structure and is very practical.
Specifically, the pre-positioning fixture platform 4 further includes a synchronous belt driving device 43 and two opposite mounting plates 44, the rotating tray 11 is located between the two mounting plates 44, the synchronous belt driving device 43 is arranged on the mounting plates 44 and located between the two mounting plates 44, and the synchronous belt driving device 43 is used for placing the table 41 for movement.
Further, please refer to fig. 1 and fig. 3 together, as a specific embodiment of the laser tailor-welding apparatus provided by the present invention, a double-material detection device is disposed on the pre-positioning feeding mechanism 12, the double-material detection device is electrically connected to the pre-positioning feeding mechanism 12, the double-material detection device is used to detect whether a frame structure is connected to a to-be-welded member of an adjacent frame structure in the placement area 111, if it is detected that the frame structure is not connected to the to-be-welded member of the adjacent frame structure in the placement area 111, the double-material detection device controls the pre-positioning feeding mechanism 12 to place the to-be-welded member on the pre-positioning fixture platform 4; if a to-be-welded part of which one frame structure is connected with an adjacent frame structure in the placement area 111 is detected, the double-material detection device does not control the pre-positioning feeding mechanism 12 to place the to-be-welded part on the pre-positioning fixture platform 4.
The double-material detection device is used for detecting whether the pre-positioning feeding mechanism 12 simultaneously grabs the same part to be welded, and the double-material detection device can detect whether the part to be welded has a laminated plate, so that normal welding between the parts to be welded is ensured, and the qualification rate of products is improved.
Specifically, the double-material detection device is an infrared sensor or a grating. When the double-material detection device is a grating, the double-material detection device is used for detecting the thickness of a part to be welded on the pre-positioning feeding mechanism 12, and if the thickness exceeds a certain threshold range, the existence of a laminated plate in the part to be welded can be judged.
Preferably, the pre-positioning feed mechanism 12 is fixedly positioned vertically above a placement area 111. If the plate stacking condition occurs, the plate directly falls on the placing area 111, and the safety of the equipment is improved.
Further, referring to fig. 1 to 4, as an embodiment of the laser tailor-welding apparatus provided by the present invention, a suction device 6 is disposed on the positioning jig platform 3, and the suction device 6 is used for sucking and directly contacting the frame structure on the horizontal surface of the jig platform.
The suction device 6 is used for positioning plates which are adaptive to different sizes and different types on the positioning clamp platform 3, so that a part to be welded on the positioning clamp platform 3 is not easy to displace in the welding process, and the qualified rate of product production is improved.
Further, as a specific embodiment of the laser tailor-welding apparatus provided by the present invention, the suction device 6 is an electromagnet or a vacuum adsorption device.
The suction device 6 is an electromagnet or a vacuum adsorption device, and when a welded part to be welded on the positioning fixture platform 3 needs to be taken out, the suction device 6 can lose suction, so that the welded part to be welded on the positioning fixture platform 3 is more convenient to take out.
Further, referring to fig. 1, fig. 6 and fig. 7, as a specific embodiment of the laser tailor-welding apparatus provided by the present invention, the laser tailor-welding apparatus includes a positioning platform 7, the positioning platform 7 moves above the positioning fixture platform 3 or away from the positioning fixture platform 3, the positioning platform 7 is provided with an anti-misalignment mechanism 71 and a driving device 72, the driving device 72 is used for driving the anti-misalignment mechanism 71 to ascend or descend, and the anti-misalignment mechanism 71 is used for pressing against a frame structure on the positioning platform 7.
The positioning platform 7 is far away from the positioning fixture platform 3, so that a to-be-welded part can be conveniently placed on the positioning fixture platform 3 or a to-be-welded object on the positioning fixture platform 3 can be conveniently welded or the welded to-be-welded part can be conveniently taken out of the positioning fixture platform 3. The misalignment preventing mechanism 71 plays a role in compressing the parts to be welded, and effectively improves the efficiency of positioning the parts to be welded on the positioning platform 7.
Specifically, the driving device 72 is a cylinder or a linear motor. The misalignment preventing mechanism 71 includes a mounting seat 711 and a roller 712, and the mounting seat 711 is connected to an output shaft of the driving device 72. The roller 712 is rotatably coupled to the mounting block 711, and the roller 712 is adapted to contact a part to be welded. The positioning stage 7 includes a positioning table 73 and a horizontal driving assembly 74. The misalignment preventing mechanism 71 and the driving device 72 are provided on the positioning table 73. The horizontal driving assembly 74 is fixed on the ground, and the horizontal driving assembly 74 drives the positioning table 73 to move.
Preferably, the positioning table 73 is a frame structure.
Further, referring to fig. 5, as a specific embodiment of the laser tailor-welding apparatus provided by the present invention, a plurality of positioning elements 33 and a side pushing mechanism 34 are disposed on the positioning fixture platform 3, the misalignment-preventing mechanism 71 is disposed around the positioning elements 33, and the side pushing mechanism 34 is used for driving the to-be-welded members of the frame structure on the positioning fixture platform 3 to move horizontally to the positioning elements 33.
The side pushing mechanism 34 is matched with the positioning part 33, so that the part to be welded on the positioning fixture platform 3 is further positioned, and the welding efficiency of the part to be welded on the positioning fixture platform 3 is improved. The positioning clamp platform 3 is matched with the pre-positioning platform 7, so that the positioning precision of the part to be welded is improved, and the qualification rate of the part to be welded is improved.
Further, please refer to fig. 4, which is a specific embodiment of the laser tailor-welding apparatus provided by the present invention, the apparatus further includes a blanking mechanism 8, the blanking mechanism 8 is disposed above the positioning clamp platform 3, the positioning clamp platform 3 is used for conveying the welded pieces to be welded to the lower side of the blanking mechanism 8, and the blanking mechanism 8 is used for clamping the finished frame and placing the finished frame to the finished station.
The blanking mechanism 8 is convenient for moving the welded part to be welded away from the positioning clamp platform 3, and the use convenience of the laser tailor-welding equipment is improved.
Specifically, the placing surface of the prepositioning clamp platform 4 and the placing surface of the positioning clamp platform 3 are located on the same horizontal plane, so that the stroke between the discharging mechanism 8 and the feeding mechanism 5 is reduced, the discharging mechanism 8 and the feeding mechanism 5 are not easy to shake in work, the placing precision of a part to be welded is improved, and the working time of the discharging mechanism 8 and the feeding mechanism 5 is shortened.
Preferably, referring to fig. 1 and 4, the blanking mechanism 8 is slidably connected to the truss device 51. The blanking mechanism 8 and the loading gripper 52 are located on the same side of the positioning jig platform 3.
Preferably, the discharging mechanism 8 includes a lifting device and a discharging gripper, the lifting device is slidably connected to the truss device 51, and the discharging gripper is fixed to an output shaft of the lifting device. The blanking gripper is a vacuum chuck.
Referring to fig. 8, the present invention further provides a laser tailor-welding method, which adopts a laser tailor-welding device, and includes the following steps:
s1: placing the to-be-welded parts in a placing area of the rotary tray;
s2: rotating the rotary tray to enable a placing area where a part to be welded is placed to be located at the pre-positioning feeding mechanism;
s3: and finishing the welding of the frame structure on the positioning fixture platform through the machining device, and taking down the finished frame on the positioning fixture platform.
Compared with the prior art, the laser tailor-welding method provided by the invention is simple to operate, improves the feeding convenience of the laser tailor-welding equipment, and improves the welding efficiency of the laser tailor-welding equipment.
Further, referring to fig. 9, as an embodiment of the laser tailor-welding method provided by the present invention, the step S2 and the step S3 include the following steps:
s2-1: checking whether a pre-positioning feeding mechanism with a frame structure stops moving when moving towards a pre-positioning fixture platform; if the pre-positioning feeding mechanism with the frame structure stops moving when moving towards the pre-positioning fixture platform, S2-2 is executed; if the pre-positioning feeding mechanism with the frame structure does not stop moving when moving towards the pre-positioning fixture platform, S2-3 is executed;
s2-2: checking whether an additional piece to be welded is connected to a frame structure on the pre-positioning feeding mechanism; if the frame structure on the pre-positioning feeding mechanism is checked to be connected with an additional piece to be welded, S2-3 is executed; if the frame structure on the pre-positioning feeding mechanism is not detected to be connected with an additional piece to be welded, executing step S2-4;
s2-3: separating the additional piece to be welded from the frame structure;
s2-4: and moving the pre-positioning feeding mechanism to the pre-positioning clamp platform for discharging.
Through the steps S2-1 to S2-4, normal welding of the frame structure is guaranteed, and the qualification rate of the finished frame is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A laser tailor-welding device is characterized by comprising a feeding device, a processing device and a positioning fixture platform, wherein the feeding device comprises a rotary tray and a pre-positioning feeding mechanism, and the processing device comprises a welding seam tracker, a laser welding mechanism, a welding rotating mechanism and a welding horizontal driving mechanism; an output shaft of the welding rotating mechanism is connected to the laser welding mechanism and used for driving the laser welding mechanism to rotate, an output shaft of the welding horizontal driving mechanism is connected to the welding rotating mechanism and used for driving the welding rotating mechanism to move in the horizontal direction, and the weld joint tracker is electrically connected to the welding rotating mechanism and the welding horizontal driving mechanism and arranged on the laser welding mechanism;
the rotary tray is provided with at least two placing areas, the placing areas are used for placing a plurality of pieces to be welded, the pieces to be welded are surrounded into a plurality of frame structures, and the frame structures are stacked one by one;
the device also comprises a pre-positioning clamp platform and a feeding mechanism;
the pre-positioning feeding mechanism is used for taking out the frame structures and placing the frame structures on the pre-positioning fixture platform, and feeding one frame structure at a time;
the pre-positioning clamp platform is used for keeping a preset distance between the to-be-welded pieces of the frame structure;
the feeding mechanism is used for taking out the frame structure on the pre-positioning fixture platform and placing the frame structure on the positioning fixture platform;
the positioning clamp platform is used for conveying the frame structure placed by the feeding mechanism to the position below the laser welding mechanism;
the welding seam tracker is used for identifying the welding seam of the frame structure on the positioning clamp platform and controlling the welding rotating mechanism and the welding horizontal driving mechanism according to the direction of the welding seam;
the laser welding mechanism is used for welding the frame structure on the positioning fixture platform into a finished frame.
2. The laser tailor welding apparatus according to claim 1, wherein said pre-positioning jig platform comprises a placing table and a plurality of positioning blocks disposed on said placing table, and a placing area for placing said frame structure is formed between said positioning blocks.
3. A laser tailor-welding apparatus according to claim 1, wherein said pre-positioning feeding mechanism is provided with a double material detecting device, said double material detecting device is electrically connected to said pre-positioning feeding mechanism, said double material detecting device is used for detecting whether a frame structure is connected to the member to be welded of the adjacent frame structure in said placing area, if it is detected that a frame structure is not connected to the member to be welded of the adjacent frame structure in said placing area, said double material detecting device controls said pre-positioning feeding mechanism to place the member to be welded on said pre-positioning jig platform; and if the to-be-welded part of the adjacent frame structure in the placing area is connected with one frame structure is detected, the double-material detection device does not control the pre-positioning feeding mechanism to place the to-be-welded part on the pre-positioning fixture platform.
4. A laser tailor-welding apparatus according to claim 1, wherein said positioning jig platform is provided with a suction device for sucking and directly contacting said frame structure on a horizontal surface of said jig platform.
5. A laser tailor-welding apparatus according to claim 4, wherein said suction means is an electromagnet or a vacuum suction means.
6. The laser tailor-welding apparatus according to claim 3, comprising a positioning platform, wherein the positioning platform is movable above the positioning fixture platform or away from the positioning fixture platform, the positioning platform is provided with an anti-misalignment mechanism and a driving device, the driving device is used for driving the anti-misalignment mechanism to ascend or descend, and the anti-misalignment mechanism is used for pressing against the frame structure on the positioning platform.
7. A laser tailor-welding apparatus according to claim 6, wherein said positioning fixture platform is provided with a plurality of positioning members and a side-pushing mechanism, said misalignment preventing mechanism is disposed around said positioning members, said side-pushing mechanism is used for driving said to-be-welded members of said frame structure on said positioning fixture platform to move horizontally to said positioning members.
8. The laser tailor-welding apparatus according to claim 1, further comprising a blanking mechanism, wherein said blanking mechanism is disposed above said positioning fixture platform, said positioning fixture platform is used for conveying said welded members to be welded to a position below said blanking mechanism, and said blanking mechanism is used for clamping a finished frame and placing said finished frame to a finished station.
9. A laser tailor welding method, wherein a laser tailor welding apparatus according to any one of claims 1 to 8 is used, comprising the steps of:
s1: placing the to-be-welded parts in a placing area of the rotary tray;
s2: rotating the rotary tray to enable a placing area where a part to be welded is placed to be located at the pre-positioning feeding mechanism;
s3: and finishing the welding of the frame structure on the positioning fixture platform through the machining device, and taking down the finished frame on the positioning fixture platform.
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